Gripping tool for engaging and pulling pump rods



March 6, 1928.

J. w. oBERBEcK GRIPPING TOOL FOR ENGAGING AND PULLING PUMP RODS Filed Aug. 15. 1923 lll.. M H

Ziegel Patented Mar. V6, 19?..8.A

f UNITED f STATES PATENT OFFICE..

JOSEPH w. oBnnBEcK, or sr. LOUIS, MrssOnR-I, ASSIGN'OR or ONE-HALF'TO CHARLES A. WINS'TON, or BOWDEN, OKLAHOMA. n

GRIPPING Toon ron ENGAGING AND PULLING Burn?Y RODS.

' Application filledy August 13, 1923. Serial NO. 657,047;

This invention relates to animprovement in gripping devices and hasfor its. primary object the purpose-of providing an improved tool which can be lowered within a casing or tubing of an oil well for engaging and withdrawing a broken pump rodor the lilre.

Another obj ect of the invention is to pro vide a gripping device which when engaged within a depending casing and forced downwardly therein will engage the rod to kbe pulled, and when forced in the opposite di-y rection will firmly grip the rod.

Another object of the invention is in pro-- viding an improved engaging and, gripping device with detachable guiding 'means for adapting thedevice or tool to be used in casings of different sizes. Y y f Other and further objects will appear in the Ispecification and be Specifically pointed out in the appended claims, reference being had to the accompanying drawingslexeinplifying the inventionl` and in which :e

lFigurel lis a vert-ical section taken through this improved gripping-` device andfshowing the same depended within an oil well casing, pump rod.

Figure 2 1s an enlarged horizontal section His comprised of a tubular .member 1 which is threaded exteriorly as designated at 2 at the forward end and `mounted on said vexterior threads is a guiding ferrule 3, said ferrnle having a centrally arranged opening .11 to which leads an inverted. funnel shape mouth 5.

. The tubular member 1 is provided with an .annular f tapering wall adjacent its forward end, said wall tapering inwardly to theopening 4 of the ferrule 3, kas clearlyfshownl inFig.1.` y

The upperend of the tubular memb'erl is Y provided with interior threads 7 and forengagement with( said vthreads vis-the threaded ready for operation upon a broken` Reciprocably mounted 'within the tubular member 1 is a block 13 having an ext-ending. tapered kend 13a land extended horizontally f rom said tapered end is aplurality .of sup,- porting pins 14 each being for the support of a depending gripping jaw 15.

Each of the jaws 15 ispreferably made .of y

hardenedA tool Lsteel and is each provided with an openingl. Vadjacentits upper end, each opening of eacli jaw being for the reception of a respective pin14,tlie lower end of yeach aw being provided withv a plurality of' teeth 1.7, each jaw having an engaging face 18 which .is adapted to bear against the annular tapered wall 6 of the tubular ineinber 1, asshown in Fig. 1. y 'A coil spring 19 is located within the tubular. member land interposed between the threaded end 8 of the sank 9 and the block` 13." Y

- u As Valready'*set-forth in the objects of this invention, the ftl-ieme thereof is to provide Casing for the purposev of engaging and withdrawing a pump rodwhich has been broken. f In the operation ofy oil wells, itA quite frequently happens that a pump rodmay break several hundred feet below the ground surface, and it is quite often a very tedious lmattento provide avconnection withy the broken rod at suoliv a great depth. l improved device is therefore applicable. y In the rope'ration'of ,the device, legs or lengths 204 each .having acoup'ling end 21V are connected together, the` lowerinost end beingy connected; .with .the threaded extension lowered in to the well casing 252.

During thelowering of ,the gripping device, thejguiding ferrule 3 willhold the tapering mouth 5 thereof in approximate concentric position with ythe tubing so that when the brokenend of the pump lrod such' as designated ,at 23 iis engaged vby' they tapered inouth 5,'itV will be forced from the inner vwall of the tubing vbylsai'd tape-red mouth so that the ,opening 4 of the gripping device' will-engage; over the upper end .of the' pump rod. The upper extending end 'of a device whichmay ,be lowered in an oil well This l Y 11 of lthe shank 9, and the device is then the rod upon being engaged within the opening 4 will engage the tapered faces 24 of the gripping jaws 15, thereby forcing the said jaws upwardly along with their supporting block 13, said block compressing the coil spring 19. This forcing upwardly of the jaws 15 along. the tapered wall 6 will lcause the toothed ends of said jawsto swing out@ wardly, and when they have swung outwardly aA distance far enough to accominodate the diameter or thickness ofthe pump rod 23, the upper end of said pump'rod will' be engaged surroundingly by the toothed ends of said jaws. l

After the upper broken end of the pump rod has become engaged by thetoothed ends of the gripping jaws 15 and the end of the rod has abutted against'the extending end rod will be firmly secured' by the jaws, and

as the gripping device is moved on upwardly said jaws will become firmly locked and the pump rod will be withdra-wn upwardly in the casing.

After the pump rod has been successfully pulled from the well casing, the' gripping Y jaws are released from the end of the rod by pressing downwardly on the tubular member 1 in which the block 13 will be forced upwardly by the rod thereby releasing the jaws 15 from engagement with the rod in w iich the gripping ends of the jaws will be swung outwardly. If, however, the jawswill not release the rod, the shank 9 isreinoved from the upper end of the tubular member and the spring 19 removed and a threaded member is engaged in thethreaded opening 25 which is provided in the block 13 so that said blockv can be pulled upwardly from the tubular member l, said block carrying the gripping jaws 15 and the upper end of the pump rod therewith. Wlhen the gripping jaws 15 are removed from the tubular member 1, it is obvious that said jaws can be readily released from their positions of gripping with the pump rod.

This improved device can be used for dif-k ferent sizes of well casing and in thisconnection a suitable diameter guiding ferrule 26,- asrshown in Fig. 4, can be secured tothe forward end of the tubular member 1a, said lferrule 26 havinga .tapered mouth 27 for receiving and guiding a pump Vrod which may be leaning against the side wall of the casing through the central opening 28 ofthe.

ferrule 26.v

l/Vhat I claim is: n y 1. A gripping device comprisinga tubu.`

lar member, a supporting block located in said member, a plurality of gripping jaws reciprocable within said member secured to the lower' end of Said block, means provided whereby said jaws are swung away from One another as they are moved in one direction,-

said jaws adapted to be moved inwardly towards each other when moved in the oppo site direction, said block being provided withV a centrally disposed opening for the reception of a drawing-out tool. Y

2. A @ripping device comprising a tubular member, khaving an inverted funnel shape mouth formed at one end, a removable shank secured to one end of-said member, a supf porting block having a reducedV portion located in said member, radially disposed pins extended from said reduced portion of said block, gripping members arranged within said tubular member adjacent saidvmouth adapted to move into receptive positions by a member to vbe introduced through i said moutlikeach of said gripping members being loosely mounted on a respective pin, said tubular member adapted to retain saidgripping members on'saidpins, and resilient means co-operable with said gripping members.

3. A gripping device comprising a tubular member, a reciprocal supporting block having va reduced end, a plurality of outwardly yprojecting pins extending from the reduced end ofl said block, a gripping jaw loosely mounted on each of said pins, said tubular member adapted ,to retain said jaws onsaid 1 pins, and means provided in said member whereby said jaws will be. moved towards each other when said block is moved; in one direction in said member.A

4. A gripping device comprising a tubular member, a reciprocal supporting block ha`ving a reduced end and ajplurality of'pins projecting from said reduced end, a' gripping jaw loosely mounted on each of said pins, la

resilient member bearing against said block, c

said. tubular member adapted to retain said jaws on said pins, and means formed on saidl tubular member for moving said jaws in wardly.-

5. A gripping device comprising a tubular member, a reciprocal supporting block having Y a tapered vend, a plurality of lpinsextending from the tapered end of said block, a gripping jaw loosely mounted on leach ofsaid 1 pins, a resilient member' bearing against said block, said tubular member adapted to re` Y tain said jaws on said pins','means formed on said tubular member for moving said kjaws inwardlyyand toolgenga'ging means formed on said block for-engagement of a drawing outvtool.

' JOSEPH W. OBERBEGK. 

